OAKLAND — The Raiders probably would like to hit the rewind button on the start of their 2015 season.

Derek Carr left the game with an injury in the second quarter and the Raiders trail the Cincinnati Bengals 24-0 at halftime of a game that isn”t displaying the signs of hope and progress Raiders fans were banking on this year.

Carr headed to the locker room shortly after taking a hit on the sideline while trying to scramble for a first down — and is officially questionable to return to action. He tried to fight to fight off Adam Jones as he crossed the line to gain, but Jones forced a fumble that went out of bounds a couple yards behind him.

That set up a fourth-and-1 from Oakland”s 44-yard line and coach Jack Del Rio elected to go for it — with Matt McGloin at quarterback — and Cincinnati stuffed a Latavius Murray run.

The Raiders haven”t provided an update on Carr”s status, but he went back to the locker room shortly after being injured and hasn”t returned.

Nothing us in the first half went well for Oakland either.

Cincinnati racked up 15 first downs to the Raiders” four and had 265 yards to Oakland”s 106. Rookie Amari Cooper looked shaky, letting the first pass of the day go through his hands, although he later added a 24-yard reception that featured a nifty run after the catch.

Bengals tight end Tyler Eifert torched the defense for eight first-half catches for 96 yards and a touchdown just before halftime that made it 24-0.

There was plenty of chippiness throughout the half and Adam Jones was involved heavily. He received only a 15-yard penalty — and one on Austin Howard on the same play made it offsetting — after ripping off Cooper”s helmet and then slamming his head against it on one play. That came at the end of a 62-yard run by fullback Jamize Olawale, but it was called back because Howard also committed a holding penalty that helped spring the run.

Aldon Smith is active and has received a fair share of snaps, first entering on the sixth defensive play. He made a minimal impact early on in his first action after being cut early in training camp by the 49ers.